c# 生成SHA1加密字元串

從網上找到的一種加密代碼：

var enstr ="abcdefg";
var strRes = Encoding.Default.GetBytes(enstr);
HashAlgorithm iSha = new SHA1CryptoServiceProvider();
strRes = iSha.ComputeHash(strRes);
var enText = new StringBuilder();
foreach (byte iByte in strRes)
{
    enText.AppendFormat("{0:x2}", iByte);
}    
 

還有另一種SHA1加密，我用來做騰訊雲簽名：

HMACSHA1 hmacsha1 = new HMACSHA1(Encoding.UTF8.GetBytes(SecretKey));
byte[] rstRes = hmacsha1.ComputeHash(Encoding.UTF8.GetBytes(str));
string strs =  Convert.ToBase64String(rstRes);
return System.Web.HttpUtility.UrlEncode(strs);